Highlights
TD Ameritrade clients were buying stocks in July, pushing the investor movement index to a new record at 7.09 vs 6.58 in June. The firm's clients have been net buyers for 6 straight months concentrating on stocks like Amazon and Tesla. The report says its clients are "dialing up" their exposure to the stock market.

Definition
The Investor Movement Index, (or the IMX), is a proprietary, behavior-based index created by TD Ameritrade designed to provide insight into Main Street sentiment. The IMX measures what investors are actually doing, and how they are actually positioned in the markets. The IMX does this by using data representing the holdings/positions, trading activity and other data from an anonymous sample from six million funded accounts. These data are used to create a snapshot that can be monitored over time, or compared to other market indicators, to suggest the current sentiment of the real portfolios held by retail investors.
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